Variation of electric shielding on virtual Frisch-grid detectors

J. K. Polack; M. Hirt; J. Sturgess; N. D. Sferrazza; A. E. Bolotnikov; S. Babalola; G. S. Camarda; Y. Cui; S. U. Egarievwe; P. M. Fochuk; R. Gul; A. Hossain; K. Kim; O. V. Kopach; L. Marchini; G. Yang; L. Xu; R. B. James

doi:10.1016/j.nima.2010.05.035

Variation of electric shielding on virtual Frisch-grid detectors

J. K. Polack, M. Hirt, J. Sturgess, N. D. Sferrazza, A. E. Bolotnikov, S. Babalola, G. S. Camarda, Y. Cui, S. U. Egarievwe, P. M. Fochuk, R. Gul, A. Hossain, K. Kim, O. V. Kopach, L. Marchini, G. Yang, L. Xu, R. B. James

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

Because of the low mobility of holes, CdZnTe (CZT) detectors operate as electron-transport-only type devices whose particular geometrical parameters and contacts configurations are specially chosen to minimize the contribution of uncollected holes into the output signal amplitudes (induction effect). Several detector configurations have been proposed to address this problem. One of them employs a large geometrical aspect ratio, parallelepiped-shaped crystal with two planar contacts on the top and bottom surfaces (anode and cathode) and an additional shielding electrode placed on a crystal's side to create the virtual Frisch-grid effect. We studied the effect of the shielding electrode length, as well as its location, on the responses of 6×6×15 mm³ virtual Frisch-grid detectors. We found that the length of the shielding electrode placed next to the anode can be reduced to 5 mm with no adverse effects on the device performance. Meanwhile, this allows for charge loss correction by reading the cathode signals.

Original language	English
Pages (from-to)	424-430
Number of pages	7
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	621
Issue number	1-3
DOIs	https://doi.org/10.1016/j.nima.2010.05.035
Publication status	Published - 2010
Externally published	Yes

Keywords

CdZnTe
Gamma-ray detectors
Virtual Frisch-grid detectors

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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10.1016/j.nima.2010.05.035

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Polack, J. K., Hirt, M., Sturgess, J., Sferrazza, N. D., Bolotnikov, A. E., Babalola, S., Camarda, G. S., Cui, Y., Egarievwe, S. U., Fochuk, P. M., Gul, R., Hossain, A., Kim, K., Kopach, O. V., Marchini, L., Yang, G., Xu, L., & James, R. B. (2010). Variation of electric shielding on virtual Frisch-grid detectors. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 621(1-3), 424-430. https://doi.org/10.1016/j.nima.2010.05.035

Polack, JK, Hirt, M, Sturgess, J, Sferrazza, ND, Bolotnikov, AE, Babalola, S, Camarda, GS, Cui, Y, Egarievwe, SU, Fochuk, PM, Gul, R, Hossain, A, Kim, K, Kopach, OV, Marchini, L, Yang, G, Xu, L & James, RB 2010, 'Variation of electric shielding on virtual Frisch-grid detectors', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 621, no. 1-3, pp. 424-430. https://doi.org/10.1016/j.nima.2010.05.035

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title = "Variation of electric shielding on virtual Frisch-grid detectors",

abstract = "Because of the low mobility of holes, CdZnTe (CZT) detectors operate as electron-transport-only type devices whose particular geometrical parameters and contacts configurations are specially chosen to minimize the contribution of uncollected holes into the output signal amplitudes (induction effect). Several detector configurations have been proposed to address this problem. One of them employs a large geometrical aspect ratio, parallelepiped-shaped crystal with two planar contacts on the top and bottom surfaces (anode and cathode) and an additional shielding electrode placed on a crystal's side to create the virtual Frisch-grid effect. We studied the effect of the shielding electrode length, as well as its location, on the responses of 6×6×15 mm3 virtual Frisch-grid detectors. We found that the length of the shielding electrode placed next to the anode can be reduced to 5 mm with no adverse effects on the device performance. Meanwhile, this allows for charge loss correction by reading the cathode signals.",

keywords = "CdZnTe, Gamma-ray detectors, Virtual Frisch-grid detectors",

author = "Polack, {J. K.} and M. Hirt and J. Sturgess and Sferrazza, {N. D.} and Bolotnikov, {A. E.} and S. Babalola and Camarda, {G. S.} and Y. Cui and Egarievwe, {S. U.} and Fochuk, {P. M.} and R. Gul and A. Hossain and K. Kim and Kopach, {O. V.} and L. Marchini and G. Yang and L. Xu and James, {R. B.}",

note = "Funding Information: This work was supported by US Department of Energy, Office of Nonproliferation Research and Development, NA-22. The manuscript has been authored by Brookhaven Science Associates, LLC under Contract no. DE-AC02-98CH1-886 with the US Department of Energy. The United States Government retains, and the publisher, by accepting the article for publication, acknowledges, a world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for the United States Government purposes. ",

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doi = "10.1016/j.nima.2010.05.035",

language = "English",

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T1 - Variation of electric shielding on virtual Frisch-grid detectors

AU - Polack, J. K.

AU - Hirt, M.

AU - Sturgess, J.

AU - Sferrazza, N. D.

AU - Bolotnikov, A. E.

AU - Babalola, S.

AU - Camarda, G. S.

AU - Cui, Y.

AU - Egarievwe, S. U.

AU - Fochuk, P. M.

AU - Gul, R.

AU - Hossain, A.

AU - Kim, K.

AU - Kopach, O. V.

AU - Marchini, L.

AU - Yang, G.

AU - Xu, L.

AU - James, R. B.

N1 - Funding Information: This work was supported by US Department of Energy, Office of Nonproliferation Research and Development, NA-22. The manuscript has been authored by Brookhaven Science Associates, LLC under Contract no. DE-AC02-98CH1-886 with the US Department of Energy. The United States Government retains, and the publisher, by accepting the article for publication, acknowledges, a world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for the United States Government purposes.

PY - 2010

Y1 - 2010

N2 - Because of the low mobility of holes, CdZnTe (CZT) detectors operate as electron-transport-only type devices whose particular geometrical parameters and contacts configurations are specially chosen to minimize the contribution of uncollected holes into the output signal amplitudes (induction effect). Several detector configurations have been proposed to address this problem. One of them employs a large geometrical aspect ratio, parallelepiped-shaped crystal with two planar contacts on the top and bottom surfaces (anode and cathode) and an additional shielding electrode placed on a crystal's side to create the virtual Frisch-grid effect. We studied the effect of the shielding electrode length, as well as its location, on the responses of 6×6×15 mm3 virtual Frisch-grid detectors. We found that the length of the shielding electrode placed next to the anode can be reduced to 5 mm with no adverse effects on the device performance. Meanwhile, this allows for charge loss correction by reading the cathode signals.

AB - Because of the low mobility of holes, CdZnTe (CZT) detectors operate as electron-transport-only type devices whose particular geometrical parameters and contacts configurations are specially chosen to minimize the contribution of uncollected holes into the output signal amplitudes (induction effect). Several detector configurations have been proposed to address this problem. One of them employs a large geometrical aspect ratio, parallelepiped-shaped crystal with two planar contacts on the top and bottom surfaces (anode and cathode) and an additional shielding electrode placed on a crystal's side to create the virtual Frisch-grid effect. We studied the effect of the shielding electrode length, as well as its location, on the responses of 6×6×15 mm3 virtual Frisch-grid detectors. We found that the length of the shielding electrode placed next to the anode can be reduced to 5 mm with no adverse effects on the device performance. Meanwhile, this allows for charge loss correction by reading the cathode signals.

KW - CdZnTe

KW - Gamma-ray detectors

KW - Virtual Frisch-grid detectors

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JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

IS - 1-3

ER -

Variation of electric shielding on virtual Frisch-grid detectors

Abstract

Keywords

ASJC Scopus subject areas

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